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Once the door is approached, it will open, revealing a Kraken heavy walker and a squad of Maliwan troops flanking it, while a Defender forms in the opening at the entrance and a squad ambushes the Vault Hunters behind them. Although the next segment of this encounter can simply be reached by approaching the door into the facility itself, it is advisable to first clear out the opposition. Once the Vault Hunters finally breach the wall, they will be met with fierce opposition within Facility Staging Zone Gamma, rife with Flash Troopers, Med Troopers, Elemental Heavies and a distant Jet Trooper sniper in the distance, as well as two new troopers armed with experimental tech created by the weapons project: the Cloak Trooper and the Reflect Trooper. Once these Overspheres are killed, the gate blocking access deeper into the base will open and a pair of Frontrunners and Assault Troopers will begin to cover up the access point. They can still strafe and fire at their opponents much like their normal variations, however, they also have a shield bar and 2 new attacks: a charge attack that fires a fan of powerful laser beams on the ground and a spin attack that launches a flurry of tracking energy bolts similar to that of Katagawa Ball. Once the Assault Troopers manning these laser turrets are killed, 2 specialized Overspheres will fly over the wall to engage the assailants.
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The Ratches have a greater health pool and damage output than their basic brethren elsewhere in the galaxy, but they can be ignored. After navigating through Approaching Midnight and entering the Blacksite Perimeter, Vault Hunters will be met with a horde of Ratches and gunfire from the Maliwan turrets mounted on the perimeter wall. After pulling one of the two switches to begin the Takedown, the door exiting the Secure Airlock will open, leading to a path downward towards the facility. Unlike other locations in the game, all of the mission progress is functionally erased upon defeat and has to start over from the beginning hallway. It is worth noting that should the Vault Hunter die at any point before reaching the checkpoint, all of the enemies will respawn. Background "Blast your way through Maliwan's blacksite and shut down the secret weapons research project codenamed "Valhalla"." Walkthrough Objectives
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